1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd908d9cd2130626c084330e56107e3aedc1f13593887c8b5863e7fbb5e8da9e8. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce9b6e64-ea2b-4ac0-a088-c155b6297277.json and https://artists.proofprofile.net/proofs/artist/ce9b6e64-ea2b-4ac0-a088-c155b6297277.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbfcd4616a2491a8987e5c093fd03f20aa8cfeddc44ccd4a8bd5463ce266636. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA52155719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b161bc91377e16368accac0530235d2cb71a6aa015660d134095ddcf19aa761. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6N2150215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b7911565da14b8d24feff8dded0c867c7274301a506a3fb0d60a629c58692. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:16:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2223375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f28d0648f6cba9d703b72ef96d019e6118e24227a95ec02bc9dfa5ffc64ca9b. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:31:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNA2223376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d9e0917c0d8c2c431274f9aea71aca0c080fa5394ecdcdda3e24803b89f315. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:40:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PYC842201273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b41f876c171cb6bd0b940c64bce826d76c23057a98b42dd8554135d8f5420e3. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PYC842302700.